<template>
    <div>
         <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>商品添加</el-breadcrumb-item>
        </el-breadcrumb>
        <el-card>
            <el-alert  title="添加商品信息" type="info"  center  show-icon :closable="false">
            </el-alert>
            <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
            </el-steps>
            <!-- 左侧标签页 -->
            <template>
                <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
                    <el-tabs :tab-position="tabPosition" style="margin-top: 10px;" v-model="activeIndex" :before-leave='beforeTabsLeave' @tab-click="tabClicked">
                        <el-tab-pane label="基本信息" name='0'>
                            <el-form-item label="商品名称" prop="goods_name">
                             <el-input v-model="addForm.goods_name"></el-input>
                            </el-form-item>
                            <el-form-item label="商品价格" prop="goods_price">
                             <el-input v-model="addForm.goods_price"></el-input>
                            </el-form-item>
                            <el-form-item label="商品重量" prop="goods_weight">
                             <el-input v-model="addForm.goods_weight"></el-input>
                            </el-form-item>
                            <el-form-item label="商品数量" prop="goods_number">
                             <el-input v-model="addForm.goods_number" type="number"></el-input>
                            </el-form-item>
                            <el-form-item label="商品分类" prop="goods_cat">
                                <el-cascader
                                    expandTrigger='hover'
                                    v-model="addForm.goods_cat"
                                    :options="CategoriesList"
                                    :props="cateProps"
                                    @change="handleChange">
                                </el-cascader>
                            </el-form-item>
                        </el-tab-pane>
                        <el-tab-pane label="商品参数" name='1'>
                            <el-form-item :label="item.attr_name" v-for="item in manyData" :key="item.attr_id">
                                <template>
                                    <el-checkbox-group v-model="item.attr_vals">
                                        <el-checkbox :label='cb' v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
                                    </el-checkbox-group>
                                </template>
                            </el-form-item>
                        </el-tab-pane>
                        <el-tab-pane label="商品属性" name='2'>
                            <el-form-item :label='item.attr_name' v-for="item in onlyData" :key="item.attr_id">
                                <el-input v-model="item.attr_vals">

                                </el-input>
                            </el-form-item>
                        </el-tab-pane>
                        <el-tab-pane label="商品图片" name='3'>
                            <el-upload
                                class="upload-demo"
                                :action="uploadUrl"
                                :on-preview="handlePreview"
                                :on-remove="handleRemove"
                                list-type="picture"
                                :headers='hederObj'
                                :on-success='handleSuccess'>
                                <el-button size="small" type="primary">点击上传</el-button>
                            </el-upload>
                        </el-tab-pane>
                        <el-tab-pane label="商品内容" name='4'>
                            <el-button type="primary" @click="addProduc">添加商品</el-button>
                        </el-tab-pane>
                        <!-- <el-tab-pane label="完成" name='5'>完成</el-tab-pane> -->
                    </el-tabs>
                </el-form>
            </template>
        </el-card>

    </div>
</template>

<script>
export default {
    data(){
        return {
            activeIndex:'0',
            tabPosition:'left',
            addForm:{
                goods_name:'',
                goods_price:0,
                goods_weight:0,
                goods_number:0,
                goods_cat:'',
                pics:[],
                attrs:[]
            },
            addFormRules: {
                goods_name: [
                { required: true, message: '请输入商品名称', trigger: 'blur' }
                ],
                goods_price: [
                { required: true, message: '请输入商品价格', trigger: 'blur' }
                ],
                goods_weight: [
                { required: true, message: '请输入商品重量', trigger: 'blur' }
                ],
                goods_number: [
                { required: true, message: '请输入商品数量', trigger: 'blur' }
                ],
                goods_cat: [
                { required: true, message: '请选择商品分类', trigger: 'blur' }
                ]
            },
            CategoriesList:[],
            cateProps: {
                label: 'cat_name',
                value: 'cat_id',
                children: 'children'
            },
            manyData:[],
            onlyData:[],
            uploadUrl:'http://127.0.0.1:8888/api/private/v1/upload',
            hederObj:{
                Authorization : window.sessionStorage.getItem('token')
            }
        }
    },
    created(){
        this.getCategories()
    },
    methods:{
        async getCategories(){
           const {data:res} =await this.$http.get('categories')
           if(res.meta.status!==200){
               return this.$message.error('获取数据失败');
               
           }
           this.CategoriesList = res.data
           console.log(res.data)

        },
        handleChange(){
            console.log(this.addForm.goods_cat)
            if(this.addForm.goods_cat.length!==3){
                this.addForm.goods_cat=[]
            }
        },
        beforeTabsLeave(activeName, oldActiveName){
            // console.log(activeName, oldActiveName)
            if(oldActiveName==='0'&&this.addForm.goods_cat.length!==3){
                this.$message.error('请选择分类')
                return false
            }
        },
        async tabClicked(){
            console.log(this.activeIndex)
            if(this.activeIndex==='1'){
               
                const {data:res} =await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'many'}})
                    res.data.forEach(item=>{
                    item.attr_vals= item.attr_vals.length==0?[]:item.attr_vals.split(' ')
                })
                this.manyData=res.data
                console.log(res.data)
            }else if(this.activeIndex==='2'){
                const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'only'}})
                this.onlyData = res.data
                console.log(this.onlyData)
            }
        },
        handleRemove(file){
            console.log(file.response.data.tmp_path)
            const filePath = file.response.data.tmp_path
             const i = this.addForm.pics.findIndex(x => x.pic === filePath)
        // 3. 调用数组的 splice 方法，把图片信息对象，从 pics 数组中移除
            this.addForm.pics.splice(i, 1)
            
            console.log(this.addForm.pics)
        },
        handlePreview(){

        },
        handleSuccess(response){
            const picsUrl={pics:response.data.tmp_path}
            // console.log(response.data.tmp_path) 
            this.addForm.pics.push(picsUrl)
            console.log(this.addForm.pics)
        },
        addProduc(){
            this.$refs.addFormRef.validate(async valid=>{
                if(!valid) return this.$message.error('请填写必要的表单项!')
                const from = JSON.parse(JSON.stringify(this.addForm))
                from.goods_cat = from.goods_cat.join(',')
                this.manyData.forEach(item => {
                    const newInfo = {
                        attr_id: item.attr_id,
                        attr_value: item.attr_vals.join(' ')
                    }
                    this.addForm.attrs.push(newInfo)
                    })
                    // 处理静态属性
                    this.onlyData.forEach(item => {
                    const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals }
                    this.addForm.attrs.push(newInfo)
                    })
                    from.attrs = this.addForm.attrs
                    const { data: res } = await this.$http.post('goods', from)

                    if (res.meta.status !== 201) {
                    return this.$message.error('添加商品失败！')
                    }

                    this.$message.success('添加商品成功！')
                    this.$router.push('/categories')
                console.log(from)
            })
        }
    },
    computed:{
        cateId(){
            if(this.addForm.goods_cat.length!==3){
                return null
            }else{
                return this.addForm.goods_cat[2]
            }
        }
    }
}
</script>

<style>
.el-steps{
    margin-top: 10px;
}
.el-step__title{
    font-size: 12px !important;
}
.el-card{
    height: 100vh;
}
.el-checkbox{
    margin: 0 10px 0 0 !important;
}
</style>